Fun fact: mitsuhiko also asked a fork of Tip4Commit to remove his projects. Now their page states [1]:

> This project has been disabled. It doesn't accept donation and it will not distribute tips.

> Reason: Project author request: https://github.com/sigmike/peer4commit/issues/110

On the other hand, Tip4Comment has only this notice [2]:

> Project maintainers have decided not to notify new contributors about tips and they probably don't like this way of funding.

[1]: http://prime4commit.com/projects/129

[2]: https://tip4commit.com/github/mitsuhiko/flask